9787cd1 Revert "[backend] remove --ignore-lock from createrepo_c"

Authored and Committed by msuchy 6 years ago
    Revert "[backend] remove --ignore-lock from createrepo_c"
    
    This reverts commit 995042811bd4e5042d256e2ccde03a305e14713f.
    
    This is again causing a lot of issues in production. Lots of threads are deadlocked.